Harper – an open-source alternative to Grammarly

IMO not using LLMs is a big plus in my book. Grammarly has been going downhill since they've been larding it with "AI features," it has become remarkably inconsistent. It will tell me to remove a comma one hour, and then tell me to add it back the next.

So is there a similar tool but based on an LLM?

Not that I think LLM is always better, but it would be interesting to compare these two approaches.